Indicator for boring-machines.



No. 741,087. PATENTED OCT. 13,1903.

0. B. WEIDLO G.

INDICATOR FOR BORING MACHINES.- APPLIUATION FILED- JAN.- 29, 1903.

' N0 MODEL.

F164- FIG. 1.

FIG- 5.

UNITED STATES Patented October 13, 1903.

PATENT OFFICE.

CARL B. WEIDLOG, OF SAG HARBOR, NEW YORK.

INDICATOR FOR BQRlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 741,087, dated October 13,1903.

I Application filed January 29, 1908. Serial No. 140,967. (No moduli) To all whom it may concern:

Be it known that I, CARL B WEIDLOG, a citizen of the United States, and a residentof Sag Harbor, Suffolk county, State of New larged end view thereof; Fig; 4', a vertical section on line 44:,Fig. 3; and Fig. 5, a horizontal section on line 5 5, Fig. 3. I

The letter a represents the table of a boring or drilling machine that supports the workpiece I).

c is the boring or drilling tool, secured to a spindle d, which is rotated by gear-wheel 0?, supported by tubular head c. The spindle cl is axially movable within the gear-wheel and is rotated by the same through the engage ment between a feather and groove. The lower end of spindle dis embraced by a vertically-movable non-rotatable sleeve f, mounted between a pair of collars d of spindle d and guided within a tubular bearing 9 of the machine-frame.- The sleeve f is lowered or raised by a hand-lever f during or after the drilling operation, so as to advance the bit or withdraw it from the work-piece.

From the bearing g there projects a fixed bracket h, upon which is supported a post '2', having a collar t" and clamped to the bracket by means of a lower nut 2' The post i is surrounded by an oscillating hub j, which is held against vertical displacement by an upper nut To the hubj there is secured by an arm j a bearingj which extends at right angles to the hub. The bearingj constitutes the support for a shaft Z, which carries at one end a friction-roller Z, adapted to impinge against sleeve f, so as to be rotated by the same. At its other end the shaft Z carries a pointer m, which plays over a dial m, fast on bearingj If desired, a second pointer m maybe rotated by shaft I through reducinggear 70, such second pointer-being used for larger work-pieces. An axial displacement of shaft Z is prevented by a pin '17,, which engages a circumferential groove Z of shaft Z.

The bore of the hub j is enlarged at its lower end to form a chamber 7' adapted for the reception of a spring 0, which engages the hub j at one end and the collar t" of post 1; at the other end. This spring'has a tendency to normally hold the hub in such a position that the roller Z is pressed with sufficient force against sleeve f as to be rotated by the same through frictional contact. The play of the hubis limited by a finger p of hub 7', that "projects between a pair of stops p of collar 2'.

In order to enable the operator to withdraw the pulley Z from sleeve f and to thus put the indicator out of action, I provide the post 'i with a circumferential groove '5 which is engaged by a clamp-screw q, tapped into hubj.

In use the bit is first lowered upon the workpiece and the pointer is set at the zero-mark of dial m. The tool being now rotated through gear-wheel cl is simultaneously lowered by depressing the handle f of sleeve f. The sleeve will in the manner described take along pulley Z, so as to move the pointer in a ratio corresponding to the depth of the hole bored.

In this way the operator can ascertain at any time the progress and completion of the boring operation;

What I claim is- In an improved indicator for boring-machines, a boring-spindle and a surrounding vertically-movable sleeve, combined with a fixed bracket, a post projecting upwardly therefrom, a spring-actuated hub surrounding the post, a bearing carried by the hub, a shaft rotatable in the bearing, a frictionwlieel on the shaft adapted to engage the sleeve, and a pointer operatively connected to the shaft, substantially as specified.

Signed by me at Sag Harbor, Sufiolk county, State of New York, this 26th day of January, 1903. i

cant B. WEIDLOG.

Witnesses:

WILLIAM FOSHAG, R. E. RICHARDS. 

